"""SMTP runtime: публичный payload и запись в .env из админки."""

from __future__ import annotations

from typing import Any

from config import Settings, get_settings
from services.env_file import (
    BOOL_ENV_KEYS,
    SECRET_ENV_KEYS,
    env_file_path,
    env_writable,
    mask_secret,
    upsert_env_keys,
)
from services.mailer import smtp_configured

SMTP_ENV_KEYS: tuple[str, ...] = (
    "SMTP_HOST",
    "SMTP_PORT",
    "SMTP_USER",
    "SMTP_PASSWORD",
    "SMTP_FROM",
    "SMTP_TLS",
    "SMTP_SSL",
)


def smtp_public_dict(settings: Settings) -> dict[str, Any]:
    path = env_file_path()
    return {
        "env_path": str(path),
        "env_writable": env_writable(path),
        "configured": smtp_configured(settings),
        "host": settings.smtp_host,
        "port": settings.smtp_port,
        "user": settings.smtp_user,
        "password_set": bool(settings.smtp_password),
        "password_hint": mask_secret(settings.smtp_password),
        "from_email": settings.smtp_from,
        "tls": bool(settings.smtp_tls),
        "ssl": bool(settings.smtp_ssl),
    }


def _is_masked_placeholder(value: str) -> bool:
    v = (value or "").strip()
    if not v:
        return True
    return "…" in v or "•" in v or "..." in v


def apply_smtp_body(body: dict[str, Any]) -> Settings:
    updates: dict[str, str | None] = {}
    mapping = {
        "SMTP_HOST": body.get("smtp_host"),
        "SMTP_PORT": body.get("smtp_port"),
        "SMTP_USER": body.get("smtp_user"),
        "SMTP_PASSWORD": body.get("smtp_password"),
        "SMTP_FROM": body.get("smtp_from"),
        "SMTP_TLS": body.get("smtp_tls"),
        "SMTP_SSL": body.get("smtp_ssl"),
    }
    for env_key, raw in mapping.items():
        if raw is None:
            continue
        if env_key in BOOL_ENV_KEYS:
            if isinstance(raw, bool):
                updates[env_key] = "true" if raw else "false"
            else:
                updates[env_key] = (
                    "true"
                    if str(raw).strip().lower() in {"1", "true", "yes", "on"}
                    else "false"
                )
            continue
        text = str(raw).strip()
        if env_key in SECRET_ENV_KEYS:
            if text == "__clear__":
                updates[env_key] = None
            elif _is_masked_placeholder(text):
                continue
            else:
                updates[env_key] = text
            continue
        updates[env_key] = text if text else None

    if updates:
        upsert_env_keys(updates, allowlist=SMTP_ENV_KEYS)
    return get_settings(require_bot_token=False)